Enhancing understanding of the hydrological cycle via pairing of process‐oriented and isotope ratio tracers

This dataset contains monthly average output files from the iCAM6 simulations used in the manuscript \"Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers,\" in review at the Journal of Advances in Modeling Earth Systems. A file corresponding to each of the tagged and isotopic variables used in this manuscript is included. Files are at 0.9° latitude x 1.25° longitude, and are in NetCDF format. Data from two simulations are included: 1) a simulation where the atmospheric model was \"nudged\" to ERA5 wind and surface pressure fields, by adding an additional tendency (see section 3.1 of associated manuscript), and 2) a simulation where the atmospheric state was allowed to freely evolve, using only boundary conditions imposed at the surface and top of atmosphere.
Specific information about each of the variables provided is located in the \"usage notes\" section below.
Associated article abstract:

The hydrologic cycle couples the Earth's ene..., Details about the simulation setup can be found in section 3 of the associated open-source manuscript, \"Enhancing understanding of the hydrological cycle via pairing of process‐oriented and isotope ratio tracers.\"

In brief, we conducted two simulations of the atmosphere using the isotope-enabled version of the Community Atmosphere Model 6 (iCAM6) at 0.9x1.25° horizontal resolution, and with 30 vertical hybrid layers spanning from the surface to ~3 hPa. In the first simulation, wind and surface pressure fields were \"nudged\" toward the ERA5 reanalysis dataset by adding a nudging tendency, preventing the model from diverging from observed/reanalysis wind fields. In the second simulation, no additional nudging tendency was included, and the model was allowed to evolve 'freely' with only boundary conditions provided at the top (e.g., incoming solar radiation) and bottom (e.g., observed sea surface temperatures) of the model. Both simulations were run between 1980-2004 for the publication, b..., Metadata are provided about each of the files below; moreover, since the attached files are NetCDF data - this information is also provided with the data files. NetCDF metadata can be accessed using standard tools (e.g., ncdump).
Each file has 4 variables: the tagged quantity, and the associated coordinate variables (time, latitude, longitude). The latter three are identical across all files, only the tagged quantity changes.
Twelve files are provided for the nudged simulation, and an additional three are provided for the free simulations:

Nudged simulation files

iCAM6_nudged_1980-2021_mon_RHevap: Mass-weighted mean evaporation source property: RH (%) with respect to surface temperature.
iCAM6_nudged_1980-2021_mon_Tevap: Mass-weighted mean evaporation source property: surface temperature in Kelvin
iCAM6_nudged_1980-2021_mon_Tcond: Mass-weighted mean condensation property: temperature (K)
iCAM6_nudged_1980-2021_mon_columnQ: Total (vertically integrated) precipitable water (kg/m2).  Not..., Readme for dataset associated with \"Enhancing understanding of the hydrological cycle via pairing of process‐oriented and isotope ratio tracers\" by Fiorella, Siler, Nusbaumer, and Noone, published in 2021 in the Journal of Advances in Modeling Earth Systems (doi: 10.1029/2021ms002648).

Contact information:
Richard Fiorella, [[e-mail]](mailto:[e-mail]); [[e-mail]](mailto:[e-mail])

Abstract

This dataset contains monthly average output files from the iCAM6 simulations used in the manuscript \"Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers,\" in review at the Journal of Advances in Modeling Earth Systems. A file corresponding to each of the tagged and isotopic variables used in this manuscript is included. Files are at 0.9° latitude x 1.25° longitude, and are in NetCDF format. Data from two simulations are included: 1) a simulation where the atmospheric model w...